Compensating device for oil-pump counters, etc.



C. H. VEEDER COMPENSATING DEVICE FOR OIL PUMP COUNTERS, ETC

2 Sheets-Sheet 1 Filed March 10, 1924 C. H. VEEDER COMPENSATING DEVICEFOR OIL PUMP COUNTERS, ETC

Filed March 10, 1924 2 Sheets-Sheet 2 IN VE IV TOR Patented Jan. 27,1925.

UNITED STATES PATENT OFFICE.

CURTIS HUSSEY VEEDER, OF HARTFORD, CONNECTICUT. ASSIGNOB TO THE VEEDEBMANUFACTURING COMPANY, OF HARTFORD, CONNIEKITICUT, A CORPORATION OFCONNECTICUT.

.COMIENSATING DEVICE FOR OIL-PUMP COUNTERS, ETC.

Application filed March 10, 19a Serial No. 698,092.

T all whom. it may concern.-

Be it known that I, CURTIS HUSSE'Y Vnnonn, a citizen ofthe UnitedStates, residing in Hartford, in the State of Connecticut,

have invented certain new and useful Improvements .in CompensatingDevices for Oil-Pump Counters, Etc, of which the following is aspecification, reference being had to the accompanying drawing, forminga part hereof.

In the application of Harold J. Williams, Serial No. 679,918, filedDecember 11, 1923, there is shown and described a device to compensatefor defective or inaccurate operation of a pump in the delivery ofgasoline and other liquids so that the registering or counting mechanismshall at all times indicate or register accurately the volume of liquiddelivered, regardless of the inaccuracy in the pump and regardless oftheextent of movement of the pump piston, that is, whether the piston ismoved through a whole stroke or through part of a stroke. In that devicethe driven member, in operative relation with the registering orcounting mech anism, receives from the driving member, which is in.operative relation with the pump, a helical motion so that thecompensation in the movement of the registering or counting mechanismshall be proportional to the length of stroke of the pump. In theembodiment of the invention illustrated in said application the driverhas a series of slots each one of which has one side at a right angle tothe direction of movement of the slotted member and the other sideinclined, the inclined sides of the several slots being inclined atdifierent an les. The driven member has a pin whic may be engaged in oneor another of such slots and has a movement with the driver, in the-slot so that there can be practical y no lost motion between the twomembers. The invention will be more fully explained hereinaftelgwithreference to the accompanying drawings in which it is illustrated, andinFigure 1 is a view in longitudinal central section, partly broken out,showing a counter or register and the compensating devices through whichthe same is driven.

Figure 2 is a detail view in section on the plane indicated by thebroken line 22 of Figure 1, looking in the direction of the arrows.

Figure 3 is a detail view in section on the plane indicated by thebroken line 33 of igure 1, looking in the direction of the arrows.

Figure 4 is a detail view of the compensating devices, partly inelevation and partly in section.

Figure 5 is a detail view of the drivin shell or cup and its severalslots as if lai out, with the several positions of the driving pinindicated.

Figure 6 is a detail view in section on the plane indicated by thebroken line 66 of lgure 1, looking in the direction of the arrows.

Fi ure'7 is a detail view of the friction clutc in section on the laneindicated by the broken line 77 of Figure 1, looking in the direction ofthe arrows.

It is assumed that the shell or cup a, shown particularly in Figures 1,2, 4 and 5, is in operative relation with some part of the pumpoperating mechanism so that it receives therewith a rotary oscillatingmovement and becomes the driver for the counter through the devices tobe described. The cup or vshell a, in the present instance, is shown asformed in its peripheral wall with four slots a a, a, .a, with parallelsides,

the first slot at being at a right angle with the direction of movementof the slotted member while the successive slots are inclined atsuccessively increasing angles.

lVith one or another of the slots a a a a*, to be selected in accordancewith a test performance of the pump, there is engaged a pin 1) which iscarried by a sleeve nut b, the latter being mounted on the threadedportion '0 of a shaft 0, which may be the supporting shaft for thenumber Wheels of the counter or register, being itself held fromrotation as by a key 0 It will be observed that if the pin 1) is inengagement with the slot a, which is at a right angle with the directionof movement with the slotted member, indicated by the arrow thereon, thesleeve 6' will have the same angular movement as the cup or shell a,'althoughit moves at the same time longitudinally with respect to theshaft 0. If, however, the pin 6 is engaged with one of the slots 0- a ora, which are successively inclined. as indicated, the pin 2) movinglongitudinally with respect to the shaft 0', by reason of the threadedengagement of the nut b with the shaft, will have a rotary movement lessthan that of the driver a. Therefore, it being assumed that the pumpdelivers at each stroke a quantity of gasoline less than the unit volumetheoretically delivered, it will be seen that the pin Z) will have anangular movement less in a corre sponding degree than that of the driverand furthermore that as the stroke of the pump and the movement of thedriver a progresses, the pin will fall behind the motion of the driver.Through such devices as those to be described the movement of the pin istransmitted to the counter mechanism and' the extent of the movement ofthe counter mechanism will therefore be governed in such manner that themovement of the counter mechanism will correspond to the effectiveoperation of the pump. F urthermore, if it is necessary to increase thelength of stroke of the pump in order to deliver the unit volume of theliquid, the extent of movement of the counter will not be increasedcorrespondingly but the counter mechanism will be operated to thecorrect extent.

In'the embodiment of the invention illushated the angular movement ofthe pin 6 is transmitted to the counter mechanism by the devices now tobe described. Mounted loosely on the shaft 0' is a sleeve dwhich haslongitudinal fingers .(l in engagement with longitudinal slots 7) of thenutb, so that the sleeve d receives the same angular moveinent as thenut 6 while the longitudinalmovement of the nut is not interfered with.The sleeve cl carries a pinion d in engagement with the gears d, d of anordinary train of differential reducing gears through which movement isimparted to a gear d. The latter, through a suitable clutch e,preferably a ball clutch, as shown in detail in Figure 7, and a sleeve7', drives the first number wheel 9 of the counter or register, thesuccessive number wheels being driven in the usual manner. A ball clutchdetentli, similar in construction to the driving clutch e, is providedfor the purpose of preventing backward movement of the sleeve f andfirst number wheel in the rotary oscillations of'the driving mechanism.

To effect the shifting of the pin from one notch to another of thedriver a the counter isremoved, together with the transmitting devices,and the pin 6 is shifted so that it will engage the proper slot of thedriver. The counter is then replaced in position.

It will be observed that compensation proportional to the extent ofmovement of the driver, that is, proportional to the length of stroke ofthe pump, is accomplished by imparting to the pin or driven member ofthe compensating devices a helical motion,

which in turn is accomplished by moving the pin longitudinally withrespect to the coacting slot.

The mode of operation of the compensating devices described issubstantially the same as that of the devices described in theapplication above mentioned and it will be seen that the lost motion orbacklash which is an inherent possibility in the construction describedin said application, is entirely ob-' viated by the formation of thedriving slots with the sides of each in parallelism.

I claim as my invention:

1. The combination of a counting mechanism for a pump, a driver thereforin operative relation with the pump and having a slot with its sidesinclined in parallelism, and a driven member in operative relation withthe counting mechanism and adapted for engagement with said slot.

2. Thecombination of a counting mechanism for a pump, a driver thereforin operative relation with the pump and having a series of differentlyinclined, parallel sided slots, and a driven member adapted forengagement with one or another of the slots of the driver and inoperative relation with the counting mechanism.

3. The combination of a counting mech anism fora pump, a cup-like driverhaving in its peripheral wall a slot with its sides inclined inparallelism, a screw threaded member in axial alinement with the driver,

'a nut mounted on the screw threaded mem- February *A. D. 1924.

CURTIS HUSSEY VEEDER.

